Most people believed, correctly, that most normal North Africans tended to be relatively poor and therefore unlikely to be able to afford a new car, and on the basis of that statistical association their presumption was that the individual North African driver of a nice car was a criminal. Now they assume he is an Uber driver, which is clear progress.

So at the end of the day, although we will try to stitch together the best evidence for these theories, the result will be tentative. We have already seen that growth is hard to measure. It is even harder to know what drives it, and therefore to make policy to make it happen. Given that, we will argue, it may be time to abandon our profession’s obsession with growth.

After the first lot of policyholders universally claimed to have lost their cattle, they decided that in order to claim that an animal had died, the owner would need to show the ear of the dead cow. The result was a robust market in cows’ ears: Any cow that died, insured or not, would have its ear cut off and the ear would then be sold to those who had insured a cow. That way they could claim the insurance and keep their cow. In.

The answers to these problems take more than a tweet. So there is an urge to just avoid them. And partly as a result, nations are doing very little to solve the most pressing challenges of our time; they continue to feed the anger and the distrust that polarize us, which makes us even more incapable of talking, thinking together, doing something about them. It often feels like a vicious cycle.

A combination of unrealistic goals, unnecessarily pessimistic expectations, and the wrong incentives for teachers contributes to ensure that education systems in developing countries fail their two main tasks: giving everyone a sound basic set of skills, and identifying talent.

It is easy to forget, especially in a crisis, the need to protect as far as possible the dignity of those being helped.

The government exists in part to solve problems no other institution can realistically tackle. To demonstrate waste in government, one needs to show there is an alternative way of organizing the same activity that works better.

Herd behavior generates informational cascades: the information on which the first people base their decision will have an outsized influence on what all the others believe.

For that, we need to understand what undermines trust in economists. A part of the answer is that there is plenty of bad economics around. Those who represent the “economists” in the public discourse are not usually the same people who are part of the IGM Booth panel.

And, perhaps most urgently, how can society help all those people the markets have left behind?